Comparison

AI Dr. J vs Ballet Protractor

Price, ratings, monetisation and update history for both apps, side by side โ€” with what reviewers say about each.

Head to head
About

AI Dr. J

Features
Read full description

AI Dr. J๋Š” AI ๊ธฐ๋ฐ˜ ํ”ผ๋ถ€ ๊ณ ๋ฏผ ์ƒ๋‹ด ๋ฐ ์Šคํ‚จ์ผ€์–ด ์ •๋ณด ์„œ๋น„์Šค์ž…๋‹ˆ๋‹ค. ใ€์ฃผ์š” ๊ธฐ๋Šฅใ€‘ โ€ข AI ํ”ผ๋ถ€ ๊ณ ๋ฏผ ์ƒ๋‹ด: ์‚ฌ์šฉ์ž๊ฐ€ ์ž…๋ ฅํ•œ ํ”ผ๋ถ€ ์ƒํƒœ/๊ณ ๋ฏผ์„ ๋ฐ”ํƒ•์œผ๋กœ ์ฐธ๊ณ ์šฉ ์ •๋ณด ์ œ๊ณต โ€ข ์Šคํ‚จ์ผ€์–ด ๊ฐ€์ด๋“œ: ํ”ผ๋ถ€ ํƒ€์ž…๊ณผ ์ƒํ™ฉ์— ๋งž์ถ˜ ๊ด€๋ฆฌ ๋ฃจํ‹ด ์ œ์•ˆ โ€ข ์ƒ๋‹ด ์ด๋ ฅ ๊ด€๋ฆฌ: ์ด์ „ ์งˆ๋ฌธ๊ณผ ๋‹ต๋ณ€์„ ํ™•์ธํ•˜๋ฉฐ ๊ด€๋ฆฌ ๊ฐ€๋Šฅ ใ€์•ˆ์ „ ์•ˆ๋‚ดใ€‘ โ€ข ๋ณธ ์•ฑ์˜ ๋‹ต๋ณ€์€ ์ฐธ๊ณ ์šฉ์ด๋ฉฐ ์˜๋ฃŒ ์ง„๋‹จ/์น˜๋ฃŒ๋ฅผ ๋Œ€์ฒดํ•˜์ง€ ์•Š์Šต๋‹ˆ๋‹ค. โ€ข ์‹ฌํ•œ ์ฆ์ƒ, ์•…ํ™”, ํ†ต์ฆ/๋ฐœ์—ด/๊ฐ์—ผ ์˜์‹ฌ, ์‘๊ธ‰ ์ƒํ™ฉ์€ ์ฆ‰์‹œ ์˜๋ฃŒ๊ธฐ๊ด€์— ๋ฌธ์˜ํ•˜์„ธ์š”. ใ€๊ฐœ์ธ์ •๋ณด ์•ˆ๋‚ดใ€‘ โ€ข ์ƒ๋‹ด ๋‹ต๋ณ€ ์ƒ์„ฑ์„ ์œ„ํ•ด ์‚ฌ์šฉ์ž๊ฐ€ ์ž…๋ ฅํ•œ ๋‚ด์šฉ์ด ์ฒ˜๋ฆฌ๋  ์ˆ˜ ์žˆ์Šต๋‹ˆ๋‹ค. โ€ข ์ž์„ธํ•œ ๋‚ด์šฉ์€ ๊ฐœ์ธ์ •๋ณด์ฒ˜๋ฆฌ๋ฐฉ์นจ์„ ํ™•์ธํ•˜์„ธ์š”. ๋ฌธ์˜: customercare@cura-pulse.com

About

Ballet Protractor

Features
Read full description

Ballet Protractor is a ballet practice tool that measures your leg angles in real time with the camera. See exactly how many degrees your leg rises in a dรฉveloppรฉ or split, and keep a record to track your progress over time. It also includes a Manual Protractor that measures any angle right on a photo โ€” like your turnout. โ–  Measures the angle between your legs Recognizes side dรฉveloppรฉs as well as front and back extensions. โ–  Real-time measurement + skeleton overlay Pose recognition draws your leg lines and the angle on screen in real time. Just step in front of the camera. โ–  Record your practice on video Your best angle is shown live, and you can save the video to your gallery or share it. โ–  Measurement history and progress chart Every session's best angle is saved automatically, with a thumbnail of that moment. Watch your angles grow at a glance on the chart. โ–  Manual Protractor โ€” any angle, on a photo Take a photo or pick one from your gallery, drag the V-shaped protractor into place, and measure any angle from 0 to 360ยฐ. For angles on the floor โ€” like turnout โ€” turn on the top-down fix: even a tilted shot is automatically straightened to a true top-down view for an accurate reading. Save or share the photo with the angle on it. โ–  Offline ยท Privacy All measurement, video and photo processing, and record keeping happen only on your device. Recorded videos and photos leave the app only when you save or share them yourself. No sign-up required โ€” measuring and recording work without internet. โ–  Available in 5 languages Korean, English, Japanese, Russian, and French, shown automatically in your device language.

Screenshots

AI Dr. J4 screens
Ballet Protractor4 screens

Verdict

The call

The clearest difference is ads: AI Dr. J at none against Ballet Protractor's shown. Ballet Protractor's advantage is update cadence (daily vs monthly). On price, in-app purchases, device support and iOS requirement there is nothing between them.

Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS

CostPrice ยท In-app purchases ยท Ads ยท Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

AI Dr. J ships an update monthly, Ballet Protractor daily. The most recent releases landed on October 30, 2026 and October 31, 2026 respectively.

Scorecard2 real differences ยท 4 level
AI Dr. J versus Ballet Protractor: the parameters behind the verdict, then further details
ParameterAI Dr. JBallet Protractor
PriceFreeFree
Update frequencyMonthlyDaily โ€” better
AdsNo โ€” betterYes
In-app purchasesNoNo
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.1 โ€” better15.5
Further details โ€” not scored
Size36 MB60 MB
Age rating12+4+
DeveloperCura-Pulse Co., LtdJungmun Choi

In-app purchases

None

AI Dr. J

No in-app purchases

None

Ballet Protractor

No in-app purchases

Questions

Is AI Dr. J free?
AI Dr. J is free to download, with no in-app purchases.
Is Ballet Protractor free?
Ballet Protractor is free to download, with no in-app purchases.
Do AI Dr. J or Ballet Protractor have ads?
Ballet Protractor shows ads; AI Dr. J does not.
Which is updated more often, AI Dr. J or Ballet Protractor?
AI Dr. J ships an update monthly, and Ballet Protractor daily. Most recently, AI Dr. J was updated on October 30, 2026 and Ballet Protractor on October 31, 2026.

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